According to NSF International, third-party certification means “that an independent organization has reviewed the manufacturing process of a product and has independently determined that the final product complies with specific standards for safety, quality or performance.”
NSF is just one of the organizations accredited by the American National Standards Institute (ANSI) as an approved certifier of water treatment products. In some cases, states or retailers (like Amazon in this case) will require certification for certain types of products to be sold there. For us at Enpress, receiving NSF certification is also an important way to show our customers that the quality and effectiveness of our products has been verified by an outside organization.
As this article from Water Quality Products (WQP) states: “Certified products provide end users, retailers and regulators the benefit of knowing an accredited third party has evaluated not only the product’s capability of passing rigorous testing according to industry standards, but also that the process in which certified products are made is reproducible. Manufacturers are continuously monitored and can only maintain certification if their manufacturing process remains consistent.”